I replaced all the bearings/bushings with sealed bearings in order to try to get some more life out of my replacement motor I just waited 2 months for. When I pulled out the front diff, I noticed it wasn't spinning smoothly. Internally it's all good. The problem seems to be the differential yoke. Once I put it all together, if I leave a 2 mm gap where the two yoke pieces come together (on the side where the input gear comes through) it spins perfectly. I inserted a spare new differential and new input gear, and found it to be catching just the same when the yoke is closed properly. With the gap, that worked smoothly again. I spent a few hours last night trying different things, but the only things I could come up with that made things spin completely freely was leaving the gap. Anyone run into this before or have suggestions? Thanks!